What is virtual reality?

What is virtual reality?

What is virtual reality?

• Virtual reality means, seeing a virtual world or unreal world running in a computer or computing device. The user can interact with 3D surroundings. It replicates physical appearances and environments.

• Virtual reality is used in various applications. Below are examples of virtual reality applications:
1. Google glass
2. Military
3. Education & training
4. Space study
5. Entertainment (3D cinema, Gaming)
6. Healthcare (Practice performing surgery)
7. Manufacturing

How many types of virtual reality technology are there?

There are three types of virtual reality technology:

1. Immersive virtual reality:

In immersive virtual reality, the user feels completely inside the virtual world created by the computer or computing device. This can be done using Head-Mounted Display (HMD) device or virtual reality headset.

How HMD works? : There is a magnetic sensor inside the HMD that identifies user’s head motion and gives information to the processor. So according to head movement, visible graphics can change the display.

What is virtual reality?

2. Semi-Immersive virtual reality:

A semi-immersive virtual reality consists of good quality graphics and monitor or projector. It involves the user in virtual reality world physically or psychologically.

Example of semi-immersive virtual reality is “flight simulator”. (Flight simulator is a device that redesigns aircraft flight and the environment, in which it flies. Used for pilot training, design, etc.)

What is virtual reality?

3. Non-Immersive virtual reality:

In non-immersive virtual reality, the user can see the virtual or unreal world using desktop or laptop. This is the significant implementation of virtual reality technique.

It is low cost since there is no need of highest quality graphics or advances hardware configurations to use non-immersive virtual reality. In addition, interaction with a virtual world can be done by keyboard, mouse and/or space ball (3D interaction device).

What is virtual reality?

Devices or components used in virtual reality technology

• Headset (Head mounted display – HMD)
• High-Definition Multimedia Interface (HDMI) cable
• 3d audio device
• Sensing gloves
• Razer-hydra (motion and orientation identification controller)
• Prio VR (motion sensing suit)
• Leap motion controller
• Stem (wireless modular motion tracker)

How virtual reality works?

• HDMI cable transfers images to the screen of the headset, from a computing device or smartphone.
• Head-tracking system tracks the motion of the head.
• The eye-tracking system tracks the movement or direction of eyes.
• Headset camera and/or sensors are used to chase the movement.

What are the advantages of using virtual reality?

• Virtual reality gives us an artificial world, which feels like realistic, where the user can experiment and explore places.
• Virtual reality helps in various domains, like education, healthcare, military, etc.
• VR gives a safe and user-controlled world.
• VR saves time and money.
• VR helps us to solve complex problems or scenarios.

What are the disadvantages of using virtual reality?

• Device cost is expensive.
• It is a virtual world only, not the real world, so not exactly we can solve real-world issues.
• It works only as programmed; it would not do anything else.


Virtual reality is the next step towards development in the technology field. By using this VR technology users can get entertainment, education, and discovery of new things. In the future, there will be a big demand for virtual reality technology in homes, offices also.

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